Secondary Glazing Cost Calculator
Use our estimator to get an indicative price for secondary glazing your heritage property — and see how it compares to full window replacement.
Heritage Cost Estimator
Secondary Glazing Investment
Get a ballpark figure in seconds — no commitment required.
Estimated Investment
£2,662 – £3,602
~£783 per window · inc. fitting
Save vs. Heritage Window Replacement
Replacing 4 heritage windows with double glazing typically costs £14,000+. Secondary glazing saves you an estimated £10,398 — and requires no planning permission.
- No planning permission needed
- Reversible & heritage-safe
- Up to 80% noise reduction
- Improves EPC rating
Estimates are indicative. Final pricing depends on site survey, frame condition, and access.
Instant Estimates
Get a ballpark investment range in seconds based on your window type, glass choice, and property size.
Heritage Friendly
Secondary glazing is reversible and internal — no planning permission required for listed buildings.
Save vs. Replacement
Typically 60-70% cheaper than full heritage window replacement, with equal or better acoustic performance.
Ready for a Precise Figure?
Our free site survey accounts for frame condition, access, and your exact noise profile to deliver a guaranteed quote.
Book Free Survey